How to place text through options in a video in a different position

I am prompted to create a video where texts will be dynamically inserted at various points in the video. It's like creating personalized videos. For example, if a person's name is specified as a parameter for a swf file, then this name will be inserted inside the video at runtime.

I am new to video editing and it will be very helpful if someone can direct me which product I should be looking at.

With adobe cs4 professional, I tried to create breakpoints, but the problem is that I cannot place the text at the coordinates where I want in the video.

After that I tried using adobe after effects, now I can create a text layer and place the text wherever I want. But I am losing the figure of how to dynamically pass the value to the text layer.

It will be very helpful if anyone can give me some idea on how to do this.

thanks

Stew